Grimgar of Fantasy and Ash (灰と幻想のグリムガル, Hai to Gensō no Gurimugaru) is a light novel series written by Ao Jūmonji and illustrated by Eiri Shirai.

Mutsumi Okubashi began serializing a manga adaptation in Gangan Joker in 2015. The novels were adapted into a 12-episode anime television series that ran from January to March 2016. An original video animation was released in March 2016. The anime is licensed in North America by Funimation, while J-Novel Club has acquired the rights to publish the original novels in English and Yen Press publishes the manga adaptation.

Fear, survival, instinct. Thrown into a foreign land with nothing but hazy memories and the knowledge of their name, they can feel only these three emotions resonating deep within their souls. A group of strangers is given no other choice than to accept the only paying job in this game-like world—the role of a soldier in the Reserve Army—and eliminate anything that threatens the peace in their new world, Grimgar.

When all of the stronger candidates join together, those left behind must create a party together to survive: Manato, a charismatic leader and priest; Haruhiro, a nervous thief; Yume, a cheerful hunter; Shihoru, a shy mage; Mogzo, a kind warrior; and Ranta, a rowdy dark knight. Despite its resemblance to one, this is no game—there are no redos or respawns; it is kill or be killed.

It is now up to this ragtag group of unlikely fighters to survive together in a world where life and death are separated only by a fine line.